Posts tagged QoS
I decided to take 642-642 QoS on somewhat of a whim. I’ve been studying QoS a lot for the CCIE (and ONT when I was working on the CCNP) and because I think it’s very cool technology. I heard the exam wasn’t too bad so I decided to take it today, and I PASSED!
I’m considering going for the CCIP, I would still need to do the BGP and MPLS exams, or the composite. With the changes in the CCIE happening my study has been derailed a bit so the CCIP might be something to focus on. We’ll see. This did renew my CCNA, CCNA: Voice and CCNP though, so at the very least I accomplished that.
Not much more to say, just a little celebratory post.
Colby Glass has been in IT since 2002. He is currently a Systems Engineer (presales) with a Cisco Gold partner and holds the CCNP R/S, CCNP DC, CCDP, CCIP, JNCIA-ER.
In this article we will be using the Modular Quality of Service CLI (MQC). This article will be useful for CCNP (ONT) or CCIP (QoS) studies.With MQC you first define traffic classes, then you build a policy map in which the actions are applied to your classes, finally you apply the policy to an interface. This is a 20/2 cable connection, before implementing QoS my P2P traffic was really beating up on all my other traffic.
First we’ll go over class maps. Class maps are used to match traffic. Here are my class maps:
class-map match-any NNTP description This is the Newsgroups traffic. match access-group name MATCH_NNTP match protocol nntp class-map match-any BT description This is the Bittorrent traffic. match protocol bittorrent match access-group name BT_PORT class-map match-any PRIORITY description This is all the traffic that gets priority. match protocol http match protocol dns match protocol secure-http match protocol ssh match access-group name MATCH_RDP
Class map NNTP is matching the port for newsgroups traffic using ACL MATCH_NNTP:
ip access-list extended MATCH_NNTP permit tcp any eq nntp any deny ip any any
Class map BT is matching my bitttorrent traffic using NBAR and the port specified in ACL BT_PORT:
ip access-list extended BT_PORT permit tcp any eq 32547 any deny ip any any
Class map PRIORITY is matching a lot of traffic, most of it is using Network Based Application Recognition (NBAR) (match protocol ______), we’re also using MATCH_RDP for Microsoft remote desktop traffic: